Riveting hammer



July 3; 1923-.

P. H. LECKINGER RIVETING HAMMER Filed Ma 1-ch 17 1921 3 Sheets-Sheet 1 5.9a ATTORNEYS INVENTOR I July 3, 1923.

P. H. LECKINGER RI VETING HAMMER Filed March 17 192i 3 Sheets-Sheet 2 I fifNVENTOR ;BY i j AQAT TORNEYS Jul 3, 1923. 1,460,424

' P. H. LECKINGER RIVETING HAMMER File d March 1'? 1921 3 Sheets-Sheet 5 MATTORNEYS Patented July 3, 1923.

UNITED STATES PATENT. OFFICE.

PHILIP H. LECKINGER, OF ROCHESTER, NEW YORK, ASSIGNOR TO HIGH SPEED HAMMER COMPANY, INC., OF ROCHESTER, NEW YORK, .A CORPORATION OF NEW YORK.

RIVETING HAMMER.

Application filed March 17, 1921. Serial No. 452,910.

illustrated in U. S. Letters Patent No.

1,173,525, granted to me on February 29,

1916, an object of this invention being to provide an improved connection between the helve and the pitman which operates such helve. Another object of the invention is to provide improved means for adjusting the throw of the helve whereby this adjustment may be readily and effectively obtained. A still further object of the invention is to provide an improved operating means for effecting connection between the driving pulley and the drive shaft.

To these and other ends the invention consists of certain parts and combinations of parts, all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings:

Fig. 1 shows in side elevation, a riveting machine constructed in accordance with this invention;

Fig. 2 is an enlarged View partially in section showing the drive shaft and the parts connected thereto;

Fig. 3 is an end view of the bearing for the drive shaft;

Fig. 4 is a vertical section through the two eccentrics on the drive shaft;

Fig. 5 is a detail view showing the manner of connection between the drive shaft and the eccentrics;

Fig. 6 is a section on the line 66, Fig. 2 of the mechanism for effecting connection between the drive pulley and the drive shaft;

Fig. 7 is a fragmentary view showing the connection between the helve and the drive shaft;

Fig. 8 is a plan view of the rear end of the helve; and r Fig. 9 is a fragmentary view showin the connection between the bearing pin 0 the I helive and the eccentrically operated pitman ro Referring more particularly to the draw ings, 1 indicates the base frame which has an upper frame 2 bolted thereto at 3 and providedwith a forwardly projecting portion 4:. On the base frame 1, a carriage 5 is vertically guided, the movement of the carriage being preferably effected through a pinion 6 meshing with a gear 7, both upon the carriage 5, the gear 7 meshing with a rack 8 arranged on the base 1. The turning of the pinion 6 through the lever arm 9 effects the turning of the gear 7 and causes the raising or lowerin of the carriage 5 on the base frame 1. 0 support the outer end of the carriage'5, the latter is provided with :1. depending arm 10 having a projection 11 adapted to engage in any one of the notches 12 formed on the upright 13 which, by bolts 14 is secured to the forwardly projecting portion of. the base 1. This carriage 5 may support an anvil 15 with which a hammer 16 mounted on the upper frame 4 cooperates. The hammer, as in my previous patent has a vertical as well as a rotary movement, the rotary movement being effected, in this instance, by a gear 17 which causes the hammer to turn there with but which permits the hammer to move therethrough, this gear bein operated b a worm (not shown) on a aft 18 whic carries a pulley (not shown) driven from a drive shaft 20 through belt 19 or other driving connection. The reciprocation of the hammer 16 is effected through a helve comprising a rear piece 21 pivoted at 22 to the frame 2, and a forward piece 23 bolted at 24: to the rear piece 21 and formed, in this instance, of hard wood. This forward helve member 23 has a connection 25 with the hammer 16 which causes the hammer to move with the helve while at the same time permits the rotation of the hammer with reference to the helve, the details of this connection not forming any part of this invention and not being illustrated.

The operation of the helve on its pivot 22 is effected by providing the rear end of the piece 21 of the helve with a central vertical opening 26 and bridging this opening by a bearing pin 27 which turns in the opposite walls of the opening. This bearing pin 27 is provided with a transverse opening 28, the walls of which taper towards the center of the opening in order to provide a sliding and rocking bearing for a pitman: rod 29. This pitman rod' is surrounded by two abutment plates 30 which have their opposed faces curved and bearing upon the cylindrical surface of the bearing pin 27. These abutment plates 30 serve as abutments for cushions 31 which, in this instance, are in the form of tubular rubber pieces surrounding the pitman rod 29. The abutment pieces are adapted for movement upon the rod while'the opposite ends of the cushions 31 are engaged by rigid abutment pieces 32 which are held against movement on the rodby nuts 33 engaging screw threaded portions of such rod.

The pitman .rod 29 has at one end a ring 34 which engages the screw threaded portion 35 on which'the lower nuts 33 also opcrate. This ring cooperates with an adjustable eccentrid36, the latter having .at one end a flange 37 and being provided with an eccentric cylindrical opening 38. In this cylindrical opening a second cylindrlcally formed eccentric 39 is mounted, this eccentric 39 being keyed at 40, to the drive shaft 20 and being provided with a flange or collar 41. The flange or collar 41 is in turn. provided with an areuate series of openings 42 in any one of which is adapted to receive a projection 43 on the eccentric 36. The eccentric 36 is adapted to move axially in order to disengage the pin 43 from oneof the perforations of the disk 41 and then, upon the turning of the eccentric 36 on the eccentric 39, the desired throw of the eccentric 36 may he obtained, this position being held by again moving the eccentric 36 axially so that the pin 43 enters one of the openings 42 to hold the adjustment.

The drive shaft 20 connects through the pulley 44 with a pulley on the shaftlS. The drive shaft is driven preferably through a pulley 45 which is mounted to turn loosely on the shaft 20 and has a clutch face 46 which is adapted to cooperate with a clutch face 47 on the collar 48 which is keyed to the shaft 20. Movement of the pulley 45 axially causes the engagement or disengagement between the faces 46 and 47. This clutch collar 48 serves as an anchoring means for a screw 49 which is adjustable to engage the adjacent face of the eccentric 36 in order to lock said eccentric in its adjusted position.

Movement of the pulley 45 toward the clutch member 48 is effected, in this instance, through a slide 50 which is mounted between the bearing 51 and the pulley 45, and is guided on the shaft 20 and on the headed screw 52 which is secured to the bearing 51 in which the shaft 20 turns. This slide has cam faces 53 which cooperate with cam faces on two blocks 54 mounted on opposite sides of the shaft 20 and supported by rods 55 which extend through the plate 50 and are guided in the bearing v Springs 55 Which cooperate with the rear face ot" the slide 50 and have abutinents 56 at their outer ends .on the rods 55 act onthese rods and tend to hold the blocks 54 toward ,the slide 50. However, when the slide is lowered, the cam faces 53 thereon effect the movement of the blocks 54 against the action of the springs 56 and cause said blocks to cooperate with the adjacent face of a ball bearing ring 45 which surrounds the shaft, moving said ring and pulley 45 toward the clutch member 48 so as to'establish'driving connection between said pulley and the shaft 20.- The slide 50 may .be operated in any suitable manner. In this instance, it has a suitable bearing 57 projecting downwardly therefrom and received in a socket 58 in a lever 59 which is pivoted at.6O to the-frame ofthe machine. This lever has a rod 61 connected thereto at and extending downward to a treadlewhich is pivoted at 64 to the base frame and extends forwardly froniits pivot to a point where it may be readily depressed, such movement being against the action of a compression spring 65.

To effectthe operation of the machine, the treadle 63 is depressed, lowering the slide 50 so as to shift the blocks 54 into en-- gagementwith the ball bearing ring 45*, causing the ,pulley 45 to be-moved toward the clutch member 48 and establish driving connection between the pulley 45 and the drive shaft 20. The rotation of the drive shaft turns the. eccentric 36 and effects the reciprocatory movement of the pitma'n 29. As this pitman connects with the helve through an opening in the oscillatory bearing pin 27, there is transmitted to the helve, a vibratingm'otion. The shocks of this vibrating-motion are absorbed by the cushions 31. This vibrating of the helve produces a rapid reciprocation of the hammer 16, which at the same time, is given a rotary movement through the gear 17.

From the foregoing it will be seen that there has been provided, in a riveting 1 n achine, a novel connection between the pit man and the helve which connection'is' of strong, durable construction and gives a flexibility, while at the same time, absorbing the shocks at this point. There has also been provided an adjustable eccentric which permits the throw of the helve to be readily adjusted. There has been also provided a means for effecting connection between a driven pulley on a drive shaft and such drive shaft, this means being sensitive in action and durable and effective.

What I claim as my invention and desire to secure by Letters Patent is: i

1. A riveting machine comprising an anvil, a hammer cooperating with said anvil, a helve for operating said hammer and having an opening therein, a bearing pin mounted to turn in opposite walls of said opening and provided with a transverse opening, a mechanism for operating the helve comprising a rod extending through said bearing pin, abutments separate from and engaging said bearing pin, and cushions on said pitman cooperating with said abutments.

2. A. riveting machine comprising an anvil, a hammer cooperating with said anvil, a helve for operating said hammer having an opening therein, a gearing pin mounted to turn in opposite walls of the opening 4 and provided with a transverse opening, the

Walls of which taper from the opposite ends toward the center, mechanism for operating the helve embodying a rod extending through said opening of the bearing pin, abutments having curved faces engaging the bearing pin, and cushions on the pitman cooperating with said abutments.

3. In a riveting machine the combination with an anvil, a hammer for cooperating with the anvil, and a helve for operating said hammer, of a mechanism for operating the helve embodying a drive shaft, two eccentrics, one secured to the drive shaft and having a flange and the other surrounding the first named eccentric one of said eccentrics being provided with a series of openings and the other of said eccentrics being provided with a pin, the length of the pin being such that the outermost eccentric may be shifted axially on the innermost eccentric to disengage the pin from the walls of the opening so that the outermost eccentric may be turned on the innermost eccentric, means for locking the outermost eccentric against axial movement independently of said pin, a ring surrounding the outermost eccentric, and a pitman connected to said ring and to the helve.

4-. A riveting machine comprising an anvil, a hammer for cooperating with the anvil, a helve for operating the hammer, and mechanism for operating the helve embodying a drive shaft, a collar on the drive shaft turning with the latter, an eccentric on the drive shaft to one side of the collar turning with said drive shaft, said eccentric having a flange provided with an arcuate'series of openings concentric with the surface of said eccentric, a second eccentric turning on the first named eccentric and having a pin adapted to enter any one of the openings to adjust the position of the second mentioned eccentric with reference to the drive shaft, an adjusting screw operating in said collar and adapted to hold the projection of the second mentioned eccentric in an opening in the flange of the first mentioned eccentric, a collar arranged about the second mentioned eccentric, and a pitman connecting the second mentioned eccentric with the helve.

5. A riveting machine comprising an anvil, a hammer, a helve for operating the hammer, an operating mechanism for the helve embodying a drive shaft, a bearing for the drive shaft, a clutch member on the drive shaft, an axially movable pulley mounted on the drive shaft and adapted to cooperate with the clutch, a mechanism for shifting the pulley axially into cooperation with the clutch embodying a. slide arranged about the drive shaft between the pulley and the bearing. and supported by said bearing,

and a block operated by said slide movable to shift the pulley on the shaft toward the clutch member. A

6. A riveting machine comprising an anvil, a hammer, a helve for operating the hammer, an operating mechanism for the helve embodying a drive shaft, a bearing for the drive shaft, a clutch member on the drive shaft, an axially movable pulley mounted on the drive shaft and adapted to cooperate with the clutch, a mechanism for shifting the pulley axially into cooperation with the clutch embodying a slide arranged about the drive shaft between the pulley and the bearing and supported by said bearing, two blocks on opposite sides of the shaft, and springs holding said blocks toward the slide to permit the blocks to shift in order to shift the pulley into'cooperation with the clutch member on the drive shaft.

, PHILIP H. LECKINGER. 

